Survival balloon



FIG. 1 is a front elevational view of a survival balloon, showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The letter characters shown in the figures are not a part of the design or claim of this patent application. 

The ornamental design for a “survival balloon”, as shown and described. 